Determination of Catechin Content in Green and Black Tea (Camellia sinensis L.) by UV-Vis Spectrophotometric Method. J. Sains. Kes [Internet]. 2024 Nov. 15 [cited 2025 Apr. 4];6(1):24-30. Available from: https://jsk.ff.unmul.ac.id/index.php/JSK/article/view/301